| Black-throated Diver | Dec 2002 | Taplow Lake |
| Great Northern Diver | 29/11/06 | Calvert Sailing Lake |
| Little Grebe | | |
| Great Crested Grebe | | |
| Red-necked Grebe | | |
| Slavonian Grebe | 09/11/11 | LMGP |
| Black-necked Grebe | | |
| Leach's Petrel | 06/12/06 | Startop's End |
| Gannet | 02/10/16 | Hastoe |
| Cormorant | | |
| Shag | 25/01/04 | Weston Turville Res |
| Bittern | | |
| Cattle Egret | 30/11/08 | Haversham |
| Little Egret | | |
| Great White Egret | | |
| Grey Heron | 11/09/11 | Linford |
| Purple Heron | 13/11/06 | Chess Valley, Latimer |
| White Stork | 01/04/04 | Jubilee River |
| Glossy Ibis | 08/05/11 | Dorney Lake |
| Spoonbill | 17/05/07 | Linford |
| Mute Swan | | |
| Bewick's Swan | | |
| Whooper Swan | | |
| Tundra Bean Goose | March 2005 | Tundra Bean Goose |
| Pink-footed Goose | | |
| White-fronted Goose | | Russian White-front |
| Greylag Goose | | |
| Canada Goose | | |
| Barnacle Goose | | |
| Brent Goose | | Dark-bellied Brent only |
| Egyptian Goose | | |
| Shelduck | | |
| Mandarin Duck | | |
| Wigeon | | |
| Gadwall | | |
| Teal | | |
| Mallard | | |
| Pintail | | |
| Garganey | | |
| Shoveler | | |
| Red-crested Pochard | | |
| Pochard | | |
| Ring-necked Duck | 13/04/04 | Foxcote |
| Ferruginous Duck | 04/10/08 | Calvert |
| Tufted Duck | | |
| Scaup | | |
| Long-tailed Duck | 18/11/05 | Calvert |
| Common Scoter | | |
| Velvet Scoter | 02/02/06 | Willen South |
| Goldeneye | | |
| Smew | | |
| Red-breasted Merganser | | |
| Goosander | | |
| Ruddy Duck | | |
| Red Kite | | |
| Marsh Harrier | | |
| Hen Harrier | | |
| Goshawk | | |
| Sparrowhawk | | |
| Buzzard | | |
| Osprey | | |
| Kestrel | | |
| Red-footed Falcon | 26/05/10 | Drayton Beauchamp |
| Merlin | | |
| Hobby | | |
| Peregrine | | |
| Red-legged Partridge | | |
| Grey Partridge | | |
| Quail | | Heard only |
| Pheasant | | |
| Lady Amherst's Pheasant | 29/03/99 | Lowe's Wood / Brickhills |
| Water Rail | | |
| Spotted Crake | 29/08/18 | Willen North |
| Little Crake | 08/11/23 | Linford |
| Moorhen | | |
| Coot | | |
| Crane | 25/04/05 | Ford, nr Dinton |
| Oystercatcher | | |
| Black-winged Stilt | 14/05/19 | College Lake |
| Avocet | | |
| Stone-curlew | 01/05/04 | College Lake |
| Little Ringed Plover | | |
| Ringed Plover | | |
| Kentish Plover | 01/05/17 | Pitstone Quarry |
| Golden Plover | | |
| Grey Plover | | |
| Lapwing | | |
| Knot | | |
| Sanderling | | |
| Little Stint | | |
| Temminck's Stint | | |
| White-rumped Sandpiper | 22/07/22 | Dorney Common |
| Pectoral Sandpiper | 10/08/14 | Manor Farm (now FFNR) |
| Curlew Sandpiper | 30/04/04 | Linford |
| Dunlin | | |
| Ruff | | |
| Jack Snipe | | |
| Snipe | | |
| Woodcock | | |
| Black-tailed Godwit | | Including limosa, College Lake 08/07/04 |
| Bar-tailed Godwit | | |
| Whimbrel | | |
| Curlew | | |
| Common Sandpiper | | |
| Spotted Sandpiper | 12/05/11 | Caldecotte South |
| Green Sandpiper | | |
| Spotted Redshank | | |
| Greenshank | | |
| Lesser Yellowlegs | 05/05/14 | College Lake |
| Wood Sandpiper | | |
| Redshank | | |
| Turnstone | | |
| Wilson's Phalarope | 27/05/06 | Hillesdon |
| Red-necked Phalarope | 07/06/20 | LMGP |
| Grey Phalarope | 03/09/08 | Weston Turville |
| Sabine's Gull | 02/07/12 | Startopsend |
| Kittiwake | 01/04/22 | Willen South |
| Black-headed Gull | | |
| Little Gull | | |
| Mediterranean Gull | | |
| Common Gull | | |
| Ring-billed Gull | 02/04/03 | LMGP |
| Lesser Black-backed Gull | | |
| Herring Gull | | |
| Yellow-legged Gull | | |
| Caspian Gull | | |
| Iceland Gull | | |
| Glaucous Gull | | |
| Great Black-backed Gull | | |
| Little Tern | | |
| Black Tern | | |
| Sandwich Tern | | |
| Common Tern | | |
| Arctic Tern | | |
| Little Auk | 22/01/12 | College Lake |
| Rock Dove / Feral Pigeon | | Feral Pigeon |
| Stock Dove | | |
| Woodpigeon | | |
| Collared Dove | | |
| Turtle Dove | | |
| Ring-necked Parakeet | | |
| Cuckoo | | |
| Barn Owl | | |
| Little Owl | | |
| Tawny Owl | | |
| Long-eared Owl | | |
| Short-eared Owl | | |
| Nightjar | | |
| Swift | | |
| Kingfisher | | |
| Hoopoe | 08/04/05 | CMK |
| Wryneck | 20/09/10 | Bacombe Hill, nr Wendover |
| Green Woodpecker | | |
| Great Spotted Woodpecker | | |
| Lesser Spotted Woodpecker | | |
| Woodlark | | |
| Skylark | | |
| Sand Martin | | |
| Swallow | | |
| House Martin | | |
| Red-rumped Swallow | 27/04/22 | LMGP |
| Tree Pipit | | |
| Meadow Pipit | | |
| Rock Pipit | | |
| Water Pipit | 16/11/07 | Startopsend |
| Yellow Wagtail | | |
| Grey Wagtail | | |
| Pied Wagtail | | |
| Waxwing | | |
| Dipper | 15/03/20 | The Rye, High Wycombe (Black-bellied) |
| Wren | | |
| Dunnock | | |
| Alpine Accentor | 05/05/24 | Pitstone Quarry |
| Robin | | |
| Nightingale | | |
| Black Redstart | | |
| Redstart | | |
| Whinchat | | |
| Stonechat | | |
| Wheatear | | |
| Ring Ouzel | | |
| Blackbird | | |
| Fieldfare | | |
| Song Thrush | | |
| Redwing | | |
| Mistle Thrush | | |
| Cetti's Warbler | | |
| Grasshopper Warbler | | |
| Sedge Warbler | | |
| Marsh Warbler | ********** | ********** |
| Reed Warbler | | |
| Blackcap | | |
| Garden Warbler | | |
| Lesser Whitethroat | | |
| Whitethroat | | |
| Dartford Warbler | | |
| Yellow-browed Warbler | 04/04/04 | Bow Brickhill |
| Wood Warbler | 24/04/10 | Steps Hill |
| Chiffchaff | | |
| Willow Warbler | | |
| Goldcrest | | |
| Firecrest | | |
| Spotted Flycatcher | | |
| Pied Flycatcher | | |
| Bearded Tit | 08/11/10 | Walton Balancing Lakes |
| Long-tailed Tit | | |
| Blue Tit | | |
| Great Tit | | |
| Coal Tit | | |
| Willow Tit | | |
| Marsh Tit | | |
| Nuthatch | | |
| Treecreeper | | |
| Red-backed Shrike | 19/09/05 | Astwood |
| Great Grey Shrike | 18/01/06 | Grendon Underwood |
| Woodchat Shrike | 01/05/03 | Langley Park |
| Jay | | |
| Magpie | | |
| Jackdaw | | |
| Rook | | |
| Carrion Crow | | |
| Raven | | |
| Starling | | |
| House Sparrow | | |
| Tree Sparrow | | |
| Chaffinch | | |
| Brambling | | |
| Greenfinch | | |
| Goldfinch | | |
| Siskin | | |
| Linnet | | |
| Twite | 05/10/03 | Steps Hill |
| Redpoll | | |
| Two-barred Crossbill | 08/02/03 | Hedgerley |
| Common Crossbill | | |
| Bullfinch | | |
| Hawfinch | 02/02/08 | Milton Keynes |
| Lapland Bunting | 29/10/10 | Dorney Lake |
| Snow Bunting | 30/04/05 | LMGP |
| Yellowhammer | | |
| Reed Bunting | | |
| Corn Bunting | | |